freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/6a2037a68a0bc2aef0006008.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a2037a68a0bc2aef0006008	Challenge 346: Piggy Bank	29	challenge-346

--description--

Given an object representing a piggy bank, return the total value as a string formatted as "$D.CC".

The object may contain any of the following:

Coin	Value
pennies	$0.01
nickels	$0.05
dimes	$0.10
quarters	$0.25

--hints--

piggy_bank({"pennies": 3, "nickels": 5, "dimes": 2, "quarters": 6}) should return "$1.98".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(piggy_bank({"pennies": 3, "nickels": 5, "dimes": 2, "quarters": 6}), "$1.98")`)
}})

piggy_bank({"pennies": 1, "nickels": 1, "dimes": 1, "quarters": 1}) should return "$0.41".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(piggy_bank({"pennies": 1, "nickels": 1, "dimes": 1, "quarters": 1}), "$0.41")`)
}})

piggy_bank({"nickels": 8, "dimes": 6, "quarters": 5}) should return "$2.25".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(piggy_bank({"nickels": 8, "dimes": 6, "quarters": 5}), "$2.25")`)
}})

piggy_bank({}) should return "$0.00".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(piggy_bank({}), "$0.00")`)
}})

piggy_bank({"pennies": 146, "nickels": 11, "dimes": 0, "quarters": 19}) should return "$6.76".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(piggy_bank({"pennies": 146, "nickels": 11, "dimes": 0, "quarters": 19}), "$6.76")`)
}})

--seed--

--seed-contents--

def piggy_bank(coins):

    return coins

--solutions--

def piggy_bank(coins):
    values = {"pennies": 0.01, "nickels": 0.05, "dimes": 0.10, "quarters": 0.25}
    total = sum(values[coin] * count for coin, count in coins.items())
    return f"${total:.2f}"